Table 2.

Correlation of EGFR mutation with serum tumor markers.

Serum tumor markers	EGFR wild-type (n = 73)	EGFR mutations (n = 75)	χ2	p
CA125 (U/ml)			2.733	0.098
<35.0	52	62
≥35.0	21	13
CA199 (U/ml)			6.435	0.011
<27.0	57	44
≥27.0	16	31
CEA (ng/ml)			2.176	0.140
<5.0	39	49
≥5.0	34	26
NSE (ng/ml)			0.116	0.734
<16.3	60	60
≥16.3	13	15
CYFRA21-1 (ng/ml)			18.247	<0.001
<3.3	25	52
≥3.3	48	23